//
//  UserAccount.swift
//  SinaWeibo
//
//  Created by 王鹏 on 16/4/16.
//  Copyright © 2016年 heihei. All rights reserved.
//

import UIKit


class UserAccount: NSObject , NSCoding {

    var access_token: String?
    var expires_in: NSTimeInterval = 0 {
        didSet {
            expires_date = NSDate(timeIntervalSinceNow: expires_in)
        }
    }
    //过期日期
    var expires_date: NSDate?
    var uid: String?
    var remind_in:String?
    
    //用户头像
    var avatar_large: String?
    
    //用户名
    var name: String?
    
    //KVC设置初始值
    init(dict: [String : AnyObject]) {
        //super实例化
        super.init()
        setValuesForKeysWithDictionary(dict)
    }
    
    override func setValue(value: AnyObject?, forUndefinedKey key: String) {

    }
    
    override var description: String {
        let keys = ["access_token","avatar_large","name","uid","expires_date"]
        return dictionaryWithValuesForKeys(keys).description
    }
    
    //对象
    func saveAccount() {
        let path = (NSSearchPathForDirectoriesInDomains(.DocumentDirectory, .UserDomainMask, true).last! as NSString).stringByAppendingPathComponent("account.plist")
        NSKeyedArchiver .archiveRootObject(self, toFile: path)
    }

    //对外提供解归档方法
    //func 是一个对象方法   在函数前 加 class就变成类方法了
    class func loadAccount() -> UserAccount? {
        //解归档
        let path = (NSSearchPathForDirectoriesInDomains(.DocumentDirectory, .UserDomainMask, true).last! as NSString).stringByAppendingPathComponent("account.plist")
        if let account = NSKeyedUnarchiver.unarchiveObjectWithFile(path) as? UserAccount {
            //判断用户的token是否过期
            if account.expires_date?.compare(NSDate()) == NSComparisonResult.OrderedDescending {
                return account
            }
        }
        return nil
    }

    //实现NSCoding的协议方法
    //解归档操作 是将磁盘中的二进制数据 -> 转换成自定义对象  跟反序列化很像
    required init?(coder aDecoder: NSCoder) {
        access_token = aDecoder.decodeObjectForKey("access_token") as? String
        expires_in = aDecoder.decodeDoubleForKey("expires_in")
        uid = aDecoder.decodeObjectForKey("uid") as? String
        avatar_large = aDecoder.decodeObjectForKey("avatar_large") as? String
        name = aDecoder.decodeObjectForKey("name") as? String
        expires_date = aDecoder.decodeObjectForKey("expires_date") as? NSDate
        
    }

    //归档 是将对象转换成二进制 -> 保存到磁盘中 跟序列化很像
    func encodeWithCoder(aCoder: NSCoder) {
        aCoder.encodeObject(access_token, forKey: "access_token")
        aCoder.encodeDouble(expires_in, forKey: "expires_in")
        aCoder.encodeObject(uid, forKey: "uid")
        aCoder.encodeObject(avatar_large, forKey: "avatar_large")
        aCoder.encodeObject(name, forKey: "name")
        aCoder.encodeObject(expires_date, forKey: "expires_date")
    }
    
    
    
    
    
    
    
    
    

    
}
